Magnetic energy (solid) and scaled helicity (dashed) spectra for CR 2156 obtained using SOLIS/VSM data. Panel a: we have reproduced Fig. 7 of Singh et al. (2018) using. Panel b: magnetic and SHMS obtained using the angular correlation function in spherical geometry, see Sect. 2.3. Both plots are shown as a function of wavenumber using the Jeans relation kR_S ≈ ℓ + 1/2, where R_S is the solar radius taken to be approximately 700 Mm. To enable a better comparison between the figures we have plotted and in panel b.